Diplomacy of the expropriation of the American oil industry in Mexico

Capital letters O I L have been the keystone of American-Mexican relations during the twentieth century. When, in the early part of the century, Americans built the fairest dreams around the Mexican future and applied themselves most busily within its borders, it was for the oil under the Mexican soil. When, later in the years, the countries quarreled he most harshly and dangerously, it was because of oil.